Add the PPAPI X509 Certificate interface and implementation.

ppapi/ppapi_proxy_untrusted.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This GYP file defines untrusted (NaCl) targets.  All targets in this
 # file should be conditionally depended upon via 'disable_nacl!=1' to avoid
 # requiring NaCl sources for building.
 
 {
   'includes': [
@@ skipping 318 matching lines @@
           'thunk/ppb_url_loader_thunk.cc',
           'thunk/ppb_url_request_info_thunk.cc',
           'thunk/ppb_url_response_info_thunk.cc',
 #          'thunk/ppb_url_util_thunk.cc',
           'thunk/ppb_video_capture_thunk.cc',
           'thunk/ppb_video_decoder_thunk.cc',
           'thunk/ppb_video_layer_thunk.cc',
           'thunk/ppb_view_thunk.cc',
           'thunk/ppb_websocket_thunk.cc',
           'thunk/ppb_widget_thunk.cc',
+          'thunk/ppb_x509_certificate_private_thunk.cc',
           'thunk/ppb_zoom_thunk.cc',
 
           'proxy/broker_dispatcher.cc',
           'proxy/dispatcher.cc',
           'proxy/host_dispatcher.cc',
           'proxy/host_var_serialization_rules.cc',
           'proxy/interface_list.cc',
           'proxy/interface_proxy.cc',
           'proxy/plugin_array_buffer_var.cc',
           'proxy/plugin_dispatcher.cc',
@@ skipping 374 matching lines @@
           '../third_party/source/i18n//wintzimpl.cpp',
           '../third_party/source/i18n//zonemeta.cpp',
           '../third_party/source/i18n//zrule.cpp',
           '../third_party/source/i18n//zstrfmt.cpp',
           '../third_party/source/i18n//ztrans.cpp',
         ],
       },
     },
   ],
 }